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The best way to understand what a hook does is to look at where it occurs in the source code.
do_action( "hook_name" )
apply_filters( "hook_name", "what_to_filter" )
.Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.
Line | Code |
---|---|
182 | 'orderby' => 'name', |
183 | 'selected' => $tag->parent, |
184 | 'exclude_tree' => $tag->term_id, |
185 | 'hierarchical' => true, |
186 | 'show_option_none' => __( 'None' ), |
187 | 'aria_describedby' => 'parent-description', |
188 | ); |
189 |
|
190 | /** This filter is documented in wp-admin/edit-tags.php */ |
191 | $dropdown_args = apply_filters( 'taxonomy_parent_dropdown_args', $dropdown_args, $taxonomy, 'edit' ); |
192 | wp_dropdown_categories( $dropdown_args ); |
193 | ?> |
194 | <?php if ( 'category' === $taxonomy ) : ?> |
195 | <p class="description" id="parent-description"><?php _e( 'Categories, unlike tags, can have a hierarchy. You might have a Jazz category, and under that have children categories for Bebop and Big Band. Totally optional.' ); ?></p> |
196 | <?php else : ?> |
197 | <p class="description" id="parent-description"><?php echo $tax->labels->parent_field_description; ?></p> |
198 | <?php endif; ?> |
199 | </td> |
200 | </tr> |